Choe, Jongwon Lee, Woo Jung Jang, Han Gyeol Song, Youngjoo Sim, Jae Hyun Kim, Jaewoo Paeng, Keewook Kim, Myungwoong 2024-01-19T20:04:01Z 2024-01-19T20:04:01Z 2021-09-02 2019-05 0032-3896 https://pubs.kist.re.kr/handle/201004/120065 This study examined the kinetics of copolymerization of two different simple model monomers, methyl methacrylate (MMA), and ethyl methacrylate (EMA), via Cu(0)-mediated reversible deactivation radical polymerization (RDRP), where the reactivities of MMA and EMA are expected to be nearly equal, and therefore, random copolymerization is favored. In these kinetic studies, the apparent propagation rate constants and induction periods with variations in the feed ratio and polymerization temperature were estimated. The reactivity ratios determined based on the kinetic studies were close to unity. In addition, the reactivities of MMA and EMA radicals to both monomers were evaluated by determining the thermodynamic parameters of the activation processes; the reactions of active species with two different monomers experience slightly different enthalpic barriers but almost zero entropic contributions, strongly suggesting that the copolymerization provides an almost, but not perfectly, random sequence and providing a clear chemical picture of the propagation reaction that occurs during copolymerization. The glass transition studies of synthesized P(MMA-r-EMA) highlight the significance of the kinetic information to predict the glass transition temperature in a copolymer system realized by Cu(0)-mediated RDRP. The current study provides a deeper understanding of the fundamental aspects and a tool to gain insight into copolymerization via RDRP, which are ultimately correlated with various physical and chemical properties. English NATURE PUBLISHING GROUP MONOMER REACTIVITY RATIOS METHYL-METHACRYLATE 2-HYDROXYETHYL METHACRYLATE STATISTICAL COPOLYMERS BUTYL METHACRYLATE CHAIN TRANSFER MICELLES STYRENE INHIBITION POLYMERS Copolymerization of simple methacrylates by Cu(0)-mediated reversible deactivation radical polymerization Article 10.1038/s41428-018-0159-y 1 POLYMER JOURNAL, v.51, no.5, pp.449 - 459 POLYMER JOURNAL 51 5 449 459 scie scopus 000466981600001 2-s2.0-85058477973 Polymer Science Polymer Science Article MONOMER REACTIVITY RATIOS METHYL-METHACRYLATE 2-HYDROXYETHYL METHACRYLATE STATISTICAL COPOLYMERS BUTYL METHACRYLATE CHAIN TRANSFER MICELLES STYRENE INHIBITION POLYMERS